Adjustable form for constructing concrete piers



March 20, 1934. D. A. PROVANCE ADJUSTABLEQ FORM FOR CONSTRUCDING CONCRETE PIERS Filed April 4) 1933 2 Sheets-Sheet 2 gwuc/wbo'b DAV/5 14L VA PPOVA/VCE Patented Mar. 20, 1934 STAES Davis Alva Provance, Adah, Pa.

Application April 4, 1983, Serial No. 664,397

4 Claims.

The present invention relates to forms for constructing concrete piers, pillars, columns and the like in coal mines.

, One of the primary objects of my invention is the provision of a form, so constructed that it may be used for an indefinite period, one that is indestructible and one that may be readily removed from the molded pier or column without injury to the finished pier or column. Another salient object of the invention is the provision of a form in which each side of the form is a complete unit and as such facilitates the assembling of the form in the shortest possible time. A further important object of the invention is justed to meet the needs which are many in the building of piers in mines.

A further important object of my invention is the provision of a lining form means, adapted to be slid into position as the pier or column is constructed and so arranged that each lining member engages the other in such a manner as to lock the lining members in position.

A further important object of the invention is the provision of apertures in some of the lining members, whereby pegs or spikes may be positioned and embedded in the pier or column during construction.

A further object of the inventionis the provision of means that permits the form to be enlarged vertically, horizontally and transversely.

A further object of the invention is the provision of a form that is removable from the finished pier 'or column in sections, and one that can be removed in the least possible time.

A further object of my invention is the provision of a form that permits the building of concrete piers against the face of coal walls.

A further object of the invention is the proof piers or columns in a recess (known as the tight side) in coal walls where the face of the coal wall is close to the mine car track.

A further object of the invention is the pro- ,4 vision of an adjustable brace, used in conjunction the provision of a form that'may be readily advision of a form that permits the construction inafter more specifically described, claimed and illustrated in the accompanying drawings, in

which: V v

Figure 1 is a perspective view of the form fully assembled, the lining members being omitf9 ted.

Figure 2 is a front elevational Viewv of the form )sghowing the relative position of the lining memers.

Figure 3 is a side elevational view of the form showing the adjustable transverse members for enlarging or reducing the thickness of the column to be constructed, and also illustrating the apertures in the side lining members. c

Figure l is a top plan view of the lining mem- 5 bers showing the relative position of the mem bers when placed in the form.

Figure 5 is a front elevational view of the form showing the extension plates inhposition for increasing the height of a pier, and further showing the adjustable lining member used when constructing a pier against the face of a coal wall.

Figure 6 is a side elevational view of Figure 5 illustrating the form used when constructing} a pierragainst the face of a coal wall, the rear section of the form being removed.

Figure 7 is a perspective view of the type of form used for constructing a pier in a recess of a coal wall where the face of the coal is close to the mine track, the arrangement of the parts be- I ing fully illustrated. r

Figure 8 is a reduced perspective view illustrating the arrangement of means for constructing a wall between the piersand face of the coal wall or between piers. V

Figure 9 is a front elevational View of one of the colunms in Figure 8, the lining members being shown fragmentarily and in dotted lines.

Figure 10 is a detail view of the adjustable.

clamp.

Referring to the drawings in detail, wherein similar reference characters designate corresponding parts throughout the'several views, the numeral 5 designates my mold form and as il- H lustrated in Figure 1 of the drawings, the form is fully assembled showing the various parts that make up the units, and the units that make up the form, the lining members being omitted.

In view of the fact that the front and backsections of the form are identical structurally, and the side sections identical structurally, applicant to avoidconfusion with a multiplicity of numerals has numbered the parts that make up transverse members 15, 16, 17 and 18.

the front section, and the parts that make up one side section.

The units as illustrated in Figure 1, comprise a front section A and a back section B and as pointed out these sections are identical structurally and each comprise a pair of longitudinal members 6 and 7 and top and bottom transverse members'B and 9. The longitudinal and transverse members that make up the units in the form may be of strap iron, angle iron or any suitable metal, and as illustrated in the drawings, I have shown all of the respective members of strap iron. Each of the longitudinal members of sections A and B on their inner faces at the top and bottom have securely mounted thereon one flange of corner brackets 10 the flange members being secured to the longitudinal members in any suitable manner such-as by spotwelding or riveting.

The longitudinal members 6 and '7 are secured edgewise to the transverse members 8 and 9 by the other flange of the. corner brackets 10 and securely held in position by bolts 11 thatengage apertures in the corner brackets and in the transversemembers. The transverse members 8 and 9 are each provided with a plurality of apertures 12 adjacent each end thereof and in spaced relation thereto. By this arrangement I provide means for adjusting the units or sections A and B horizontally, thus allowing the sections to be enlarged.

. The side units C and D as pointed out are identical structurally and each unit consists of two sections, sections E and F and these sections each comprise longitudinal. members 13 and 14 and Mounted on the inner faces of the longitudinal members 13 and 14 at the top and bottom are corner brackets 19 and 20, each of which have one flange rigidly secured to the inner face of the longitudinal members in any suitable manner such as by bolting spotwelding or riveting. The longitudinal members 13 and 14 are secured edgewise to the transverse members 15, 16, 1'7 and 13 by the other flange of the brackets 19 and 20 and securely held in position by bolts 21 that engage apertures in the brackets and transverse members.

It is to be noted at this point that the longitudinal members 13 and 14 are offset from the ends of the transverse members 15, 16, 17 and 13 for a purpose to be later described. The transverse members 15, 16, 17 and 13 of sections E and F are each provided with a plurality of apertures 22 arranged in spaced relation, the members overlapping each other and are held in locked position by bolts 23 Which engage the apertures in the transverse members.

The complete side sections C and D are held in locked position as units in the form by corner brackets 24 and 25, one flange of each of these corner brackets is riveted bolted or spot welded to the inner face of the transverse members 15, 16, 1'7 and 18, the other flange of the brackets 24 and '25 engage the inner face of the transverse memset from the ends of the transverse members a space 27 is provided between the outer face of the "longitudinal members and the inner face of the brackets 24 and 25 and this space permits the removal of the bolts 26 when the form is to be enlarged or removed from the moulded pier.

The longitudinal members 6 and 7 of sections A and B are in spaced relation to the longitudinal members 13 and 14 of sections C and D and by this arrangement I provide openings 28 between these members for the reception of lining members 29. As illustrated in Figures 2, 3 and 4 of the drawings the lining members 29 are slid into the openings 28 and are positioned in the mam ner illustrated in Figure 4, one end of each of the lining members engaging the inner face of one of the lining members, the other end of the lining members protruding outwardly from the form an appreciable distance.

The lining members if desired may be secured to the longitudinal members by any suitable means, such as by wires (not shown). Certain of the side lining members are provided with a pair :of openings 30, the lining members so provided being. adjacent the top and bottom of the form. By this arrangement I provide a means for inserting spikes 31 Figure 8, into the column during its construction and when completed the spikes are rigidly imbedded into the column for a purpose to be later described.

The form illustrated in Figures 1, 2 and 3 is used in building concrete piers in the mine and mine rooms where all four sides of the piers are l 05 exposed. To enlarge this form to increase the size of piers, columns and the like in breadth and width, the bolts 26 which secure the side sections C and D to sections A and B are removed and sections ,0 and D moved outwardly until the -IIO apertures in the corner brackets 24 and 25 are in line with the apertures 12 adjacent the ends of the transverse members Sand 9-of sections A and B, the bolts 26 are then placed in the apertures and the sections locked in rigid pom- 1 15 tion. The bolts 11 are next removed from the transverse members 8 and 9 and the longitudinal members moved outwardly towards the ends of the transverse members until the apertures in the brackets are in line with the apertures adja-l20 cent theapertures securing sections C and D to vsections A'and B. The bolts 11 are inserted through the apertures and the longitudinal members locked in position. The enlargement thus far has been horizontal. To enlarge the' igs side sections C and D and increase the width, the bolts 23 are removed from the transverse members of sections E and F and the sections moved away from each other until the desired size has een reached, the bolts 23 are thenI placedin, the apertures in the transverse members thus looking them securely together.

To increase the height of the column, I provide plates 32, Figures 5 and 6 of strap iron or any suitable metal-and these plates are provided'a' 5 with a plurality of apertures 33. The plates at there lower ends are provided with a substantially U-shaped member 34 secured to the lower ends of the plates in any suitable. manner, but I would have it understood that the U-shaped-T1 0 member may be integral with the plates. Each of the longitudinal members of the forms are provided with apertures 35. When it is desired to increase theheight of the piers or columns the plates 34-are placed on the outer faces of the 5 longitudinal members until one of the apertures in the plate registers with the aperture 35 in the longitudinal-member, a bolt 36 is then inserted and the plate locked to-said longitudinal member.. The lining members-are positioned in thcextension in the same manner as hereinbefore described.

In Figures and 6 I have illustrated the form used in building piers or columns against the 6 face of a coal wall. The form is identical structurally with the form illustrated in Figure 1 and is constructed by removing section B or the back section from the form illustrated in Figure 1. By removing the back section, the back of the form is open and is fitted against the coal wall. To increase the width, height and breadth the same changes are made as in Figure 1 form. It is to be noted that in the height extension of the form for piers against a coal wall only six extension plates 32 are used instead of eight as in Figure 5 form. The lining members in Figures 5 and 6 are locked in position by an adjustable front lining member 37, which comprises two pieces of material each of which are provided with a pair of slots 38 and held in slidable engagement by bolts 39.

In Figure 7 I have illustrated the form used in the building of piers or columns in coal walls where theface of the coal wall is close to the mine car track, and which is known as the tight side of the wall. Toconstruct the form illustrated in Figure '7, section B is removed from the form illustrated in Figure 1, sections E of the side sections C and D are removed. Each of the longitudinal members 13 of sections E are removed from the transverse members 15 and 16. The longitudinal members 13 are then positioned on the transverse members 17 and 18 of sections F as illustrated in Figure 7 and it is to be noted that one of the longitudinal members is positioned on the transverse members having its outer face imiplaner with the edge of the transverse members. Ihe other longitudinal member is offset an appreciable distance from the ends of the transverse members.

In Figure 8 I have illustrated two columns, G and H. In column G attaching means are illustrated on the pier when it is desired to build a wall between the column and the face of a coal wall. The means illustrated is a unit I comprising a longitudinal member 40 having arms 41 and 42 secured to one face of the longitudinal member in any suitable manner. The arms 41 and 42 are provided at one end with an aperture 43, which engages the spikes 31 in the column and holds the unit in position. The lining mem bers 29 are then slid into position transverse to the longitudinal members, the form being now ready to receive the concrete. If it is desired to build a wall between columns, a pair of unitsl'. are positioned on the outer faceslof the columns as illustrated in Figure 8 column H (one column being shown). The lining members are slid in position between the outer or front faces of the columns and the inner edge of the longitudinal members. In order that the longitudinal members may be kept in plumb, I provide an adjustable clamp illustrated in Figure 10, the jaws of each end of the clamp engaging the longitudinal members.

What is claimed is:

1. In an adjustable form for molding concrete piers, an upper frame and a lower frame, said frames being held in spaced relation by longitudinal members secured to the upper and lower frames, said longitudinal members being offset from the ends of said frames and in spaced relation to the other longitudinal members forming openings, and lining members in said openings.

2. In an adjustable form for molding concrete piers, an upper frame and a lower frame, said frames comprising side members slidably adjustable, said frames being held in spaced relation by longitudinal members secured to the upper and lower frames, said longitudinal members being offset from the ends of said frames and in spaced relation to the other longitudinal members forming openings and lining members in said openings.

3. In an adjustable form for molding concrete piers, an upper frame and a lower frame, said frames comprising side members slidably adjustable, each of said side members having openings therein, bolts adapted to" pass through the openings in the side members for locking engagement, upper and lower, front and back transverse members secured to the side members, said upper and lower frames being held in spaced 110 relation by longitudinal members, the front and back longitudinal members being offset from the ends of the said transverse members and in spaced relation to the side longitudinal members forming openings for the reception of lining 5 members.

4. In an adjustable form for molding concrete piers, an upper frame and a lower frame, said frames comprising front transverse members and side members, said frames being held in spaced 120 relation by longitudinal members secured to the upper and lower frames, the rear longitudinal member of one side section having its face uniplanar with the end of the upper and lower side section, the opposite rear longitudinal member 125 of the other side section being offset from the ends of the upper and lower side members, the front longitudinal members being offset from the ends of the transverse members and in spaced relation to the forward side longitudinal mem- 130 bers forming an opening for the reception of lining members.

DAVIS ALVA PROVAN CE. 

